Review on CRJ Voltage Step Up Sleeved Adapter Computer Components by Tony Basler

I am using this to power two PC case fans from a single USB port. One is installed on the laptop to keep it cool while the other is used to cool a pair of bare hard drives mounted in an external docking station. With the increased tension from this cable, both run at good speeds and provide good airflow. I have no idea why noise or heat is a rating factor for a cable, but it's definitely value for money.